Compile the front TextWrangler java source file using applescript (See related posts)

tell application "TextWrangler"
	set the_file to file of text document 1
end tell

set AppleScript's text item delimiters to ":"
set source_file to the last text item of (the_file as string)

tell application "Finder"
	set the_folder to container of the_file as alias
end tell

tell application "Terminal"
	activate
	set shell_script to "cd " & (quoted form of POSIX path of the_folder) & "; javac " & source_file
	if (count windows) is 0 then
		do script shell_script
	else
		do script shell_script in the front window
	end if
end tell